export axi4 lite cpuif

src/peakrdl_busdecoder/__peakrdl__.py

@@ -5,7 +5,7 @@ from peakrdl.config import schema
 from peakrdl.plugins.entry_points import get_entry_points
 from peakrdl.plugins.exporter import ExporterSubcommandPlugin
 
-from .cpuif import BaseCpuif, apb3, apb4
+from .cpuif import BaseCpuif, apb3, apb4, axi4lite
 from .exporter import BusDecoderExporter
 from .udps import ALL_UDPS
 
@@ -24,8 +24,8 @@ def get_cpuifs(config: list[tuple[str, Any]]) -> dict[str, type[BaseCpuif]]:
         "apb3-flat": apb3.APB3CpuifFlat,
         "apb4": apb4.APB4Cpuif,
         "apb4-flat": apb4.APB4CpuifFlat,
-        # "axi4-lite": axi4lite.AXI4Lite_Cpuif,
+        "axi4-lite": axi4lite.AXI4LiteCpuif,
-        # "axi4-lite-flat": axi4lite.AXI4Lite_Cpuif_flattened,
+        "axi4-lite-flat": axi4lite.AXI4LiteCpuifFlat,
     }
 
     # Load any cpuifs specified via entry points

src/peakrdl_busdecoder/cpuif/axi4lite/__init__.py

@@ -0,0 +1,4 @@
+from .axi4_lite_cpuif import AXI4LiteCpuif
+from .axi4_lite_cpuif_flat import AXI4LiteCpuifFlat
+
+__all__ = ["AXI4LiteCpuif", "AXI4LiteCpuifFlat"]

src/peakrdl_busdecoder/cpuif/axi4lite/axi4_lite_cpuif_flat.py

@@ -0,0 +1,94 @@
+from typing import overload
+
+from systemrdl.node import AddressableNode
+
+from ...utils import get_indexed_path
+from ..base_cpuif import BaseCpuif
+
+
+class AXI4LiteCpuifFlat(BaseCpuif):
+    template_path = "axi4lite_tmpl.sv"
+    is_interface = True
+
+    def _port_declaration(self, child: AddressableNode) -> str:
+        base = f"axi4lite_intf.master m_axil_{child.inst_name}"
+
+        # When unrolled, current_idx is set - append it to the name
+        if child.current_idx is not None:
+            base = f"{base}_{'_'.join(map(str, child.current_idx))}"
+
+        # Only add array dimensions if this should be treated as an array
+        if self.check_is_array(child):
+            return f"{base} {''.join(f'[{dim}]' for dim in child.array_dimensions)}"
+
+        return base
+
+    @property
+    def port_declaration(self) -> str:
+        """Returns the port declaration for the AXI4-Lite interface."""
+        slave_ports: list[str] = ["axi4lite_intf.slave s_axil"]
+        master_ports: list[str] = list(map(self._port_declaration, self.addressable_children))
+
+        return ",\n".join(slave_ports + master_ports)
+
+    @overload
+    def signal(self, signal: str, node: None = None, indexer: None = None) -> str: ...
+    @overload
+    def signal(self, signal: str, node: AddressableNode, indexer: str) -> str: ...
+    def signal(self, signal: str, node: AddressableNode | None = None, indexer: str | None = None) -> str:
+        if node is None or indexer is None:
+            # Node is none, so this is a slave signal
+            return f"s_axil.{signal}"
+
+        # Master signal
+        return f"m_axil_{get_indexed_path(node.parent, node, indexer, skip_kw_filter=True)}.{signal}"
+
+    def fanout(self, node: AddressableNode) -> str:
+        fanout: dict[str, str] = {}
+
+        wr_sel = f"cpuif_wr_sel.{get_indexed_path(self.exp.ds.top_node, node, 'gi')}"
+        rd_sel = f"cpuif_rd_sel.{get_indexed_path(self.exp.ds.top_node, node, 'gi')}"
+
+        # Write address channel
+        fanout[self.signal("AWVALID", node, "gi")] = wr_sel
+        fanout[self.signal("AWADDR", node, "gi")] = self.signal("AWADDR")
+        fanout[self.signal("AWPROT", node, "gi")] = self.signal("AWPROT")
+
+        # Write data channel
+        fanout[self.signal("WVALID", node, "gi")] = wr_sel
+        fanout[self.signal("WDATA", node, "gi")] = "cpuif_wr_data"
+        fanout[self.signal("WSTRB", node, "gi")] = "cpuif_wr_byte_en"
+
+        # Write response channel (master -> slave)
+        fanout[self.signal("BREADY", node, "gi")] = self.signal("BREADY")
+
+        # Read address channel
+        fanout[self.signal("ARVALID", node, "gi")] = rd_sel
+        fanout[self.signal("ARADDR", node, "gi")] = self.signal("ARADDR")
+        fanout[self.signal("ARPROT", node, "gi")] = self.signal("ARPROT")
+
+        # Read data channel (master -> slave)
+        fanout[self.signal("RREADY", node, "gi")] = self.signal("RREADY")
+
+        return "\n".join(f"assign {lhs} = {rhs};" for lhs, rhs in fanout.items())
+
+    def fanin(self, node: AddressableNode | None = None) -> str:
+        fanin: dict[str, str] = {}
+        if node is None:
+            fanin["cpuif_rd_ack"] = "'0"
+            fanin["cpuif_rd_err"] = "'0"
+        else:
+            # Read side: ack comes from RVALID; err if RRESP[1] is set (SLVERR/DECERR)
+            fanin["cpuif_rd_ack"] = self.signal("RVALID", node, "i")
+            fanin["cpuif_rd_err"] = f"{self.signal('RRESP', node, 'i')}[1]"
+
+        return "\n".join(f"{lhs} = {rhs};" for lhs, rhs in fanin.items())
+
+    def readback(self, node: AddressableNode | None = None) -> str:
+        fanin: dict[str, str] = {}
+        if node is None:
+            fanin["cpuif_rd_data"] = "'0"
+        else:
+            fanin["cpuif_rd_data"] = self.signal("RDATA", node, "i")
+
+        return "\n".join(f"{lhs} = {rhs};" for lhs, rhs in fanin.items())